Finding the Fourth Proportional to 1,155,404.76, 1,594,428.75 and 639,145.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155,404.76 : 1,594,428.75 = 639,145.19 : x
2. Step 2: Convert to fraction form
   1,155,404.76/1,594,428.75 = 639,145.19/x
3. Step 3: Cross multiply
   1,155,404.76x = 1,594,428.75 × 639,145.19
4. Step 4: Simplify right side
   1,155,404.76x = 1,019,071,458,388.07
5. Step 5: Solve for x
   x = 1,019,071,458,388.07/1,155,404.76
6. Step 6: Final answer
   x = 882,003.86